Magnitude means brightness. Absolute magnitude tells us how bright a star is. What is the brightness of a blue star in the upper left corner of your H-R Diagram?

Question

10 to 5
10 to 5

-15 to -20
-15 to -20

0 to -5
0 to -5

20 to 15

Answer 1

In the Hertzsprung-Russell (H-R) Diagram, blue stars are typically very luminous and are found in the upper left corner. The absolute magnitude of these hot and massive stars generally ranges from about -15 to -20. Therefore, the correct range for the brightness of a blue star in the upper left corner of the H-R Diagram would be:

-15 to -20.